Electronic device including battery

Abstract

A battery is provided. The battery includes a negative electrode including a first coating portion coated with a negative electrode active material and a first uncoated portion disposed adjacent to the first coating portion, a positive electrode disposed to face the negative electrode and including a second coating portion coated with a positive electrode active material and a second uncoated portion disposed adjacent to the second coating portion, a first separator disposed between one surface of the negative electrode and one surface of the positive electrode, and a second separator disposed on another surface of the negative electrode. The positive electrode, the negative electrode, and the at least one of the first separator and the second separator may be prepared in a roll shape formed by winding.

What is claimed is: 
     
         1 . An electronic device comprising:
 a battery including:
 a negative electrode including a first coating portion coated with a negative electrode active material and a first uncoated portion disposed adjacent to the first coating portion, 
 a positive electrode disposed to face the negative electrode and including a second coating portion coated with a positive electrode active material and a second uncoated portion disposed adjacent to the second coating portion, 
 a first separator disposed between one surface of the negative electrode and one surface of the positive electrode, and 
 a second separator disposed on another surface of the negative electrode, 
   wherein the positive electrode, the negative electrode, and the at least one of the first separator or the second separator are prepared in a roll shape formed by winding,   wherein a plurality of holes are formed in at least one of the first uncoated portion and the second uncoated portion, and   wherein a binder coated on the first separator and a binder coated on the second separator combine each other through the plurality of holes.   
     
     
         2 . The electronic device of  claim 1 , wherein an adhesive is further applied to the plurality of holes. 
     
     
         3 . The electronic device of  claim 1 ,
 wherein the negative electrode further includes a negative electrode tab on the first uncoated portion not coated with the negative electrode active material, and   wherein the positive electrode further includes a positive electrode tab on the second uncoated portion not coated with the positive electrode active material.   
     
     
         4 . The electronic device of  claim 1 ,
 wherein the first uncoated portion is formed in at least one of a front end portion and a rear end portion of the negative electrode, and   wherein the second uncoated portion is formed in at least one of a front end portion and a rear end portion of the positive electrode.   
     
     
         5 . The electronic device of  claim 1 , wherein the positive electrode and the negative electrode include a substrate surface formed of a metal, a conductive additive, and a binder. 
     
     
         6 . The electronic device of  claim 5 ,
 wherein the conductive additive includes a fine carbon powder, and   wherein the binder is formed by uniformly applying slurry.   
     
     
         7 . The electronic device of  claim 1 , wherein the first separator and the second separator include a separator fabric, a ceramic, and an adhesive binder. 
     
     
         8 . The electronic device of  claim 1 , wherein the binder coated on the first separator and the binder coated on the second separator directly combine each other through the plurality of holes formed in the first uncoated portion and the plurality of holes formed in the second uncoated portion. 
     
     
         9 . The electronic device of  claim 1 ,
 wherein an adhesive is applied to at least a part of the plurality of holes formed in the first uncoated portion of the negative electrode or the plurality of holes formed in the second uncoated portion of the positive electrode, and   wherein the binder coated on the first separator and the binder coated on the second separator directly combine with the adhesive.   
     
     
         10 . The electronic device of  claim 7 ,
 wherein the ceramic is applied to one surface and another surface of the separator fabric, and   wherein the adhesive binder is coated on an outer surface of the ceramic.   
     
     
         11 . The electronic device of  claim 1 , wherein the second separator, the negative electrode, the first separator, and the positive electrode are stacked sequentially to form the battery in the roll shape. 
     
     
         12 . An electronic device comprising:
 a battery including:
 a negative electrode including a first coating portion coated with a negative electrode active material and a first uncoated portion not coated with the negative electrode active material, 
 a positive electrode including a second coating portion coated with a positive electrode active material and a second uncoated portion not coated with the positive electrode active material, 
 a first separator disposed on another surface of the negative electrode, 
 a second separator disposed between one surface of the negative electrode and one surface of the positive electrode, 
   wherein the positive electrode, the first separator, the negative electrode, and the second separator are stacked to form a roll shape,   wherein a plurality of holes are formed in at least one of the first uncoated portion and the second uncoated portion, and   wherein a binder coated on the first separator and a binder coated on the second separator combine each other directly through the plurality of holes or through an adhesive applied to the plurality of holes.   
     
     
         13 . The electronic device of  claim 12 ,
 wherein the negative electrode further includes a negative electrode tab on the first uncoated portion not coated with the negative electrode active material, and   wherein the positive electrode further includes a positive electrode tab on the second uncoated portion not coated with the positive electrode active material.   
     
     
         14 . The electronic device of  claim 12 ,
 wherein the first uncoated portion is formed in at least one of a front end portion and a rear end portion of the negative electrode, and   wherein the second uncoated portion is formed in at least one of a front end portion and a rear end portion of the positive electrode.   
     
     
         15 . The electronic device of  claim 12 , wherein the positive electrode and the negative electrode include a substrate surface formed of a metal, a conductive additive, and a binder. 
     
     
         16 . The electronic device of  claim 15 ,
 wherein the conductive additive includes a fine carbon powder, and   wherein the binder is formed by uniformly applying slurry.   
     
     
         17 . The electronic device of  claim 12 , wherein the first separator and the second separator include a separator fabric, a ceramic, and an adhesive binder. 
     
     
         18 . The electronic device of  claim 17 ,
 wherein the ceramic is applied to one surface and another surface of the separator fabric, and   wherein the adhesive binder is coated on an outer surface of the ceramic.   
     
     
         19 . The electronic device of  claim 12 ,
 wherein the first coating portion is positioned adjacent to the first uncoated portion and is formed in at least a part except for a front end portion and a rear end portion of the negative electrode, and   wherein the second coating portion is positioned adjacent to the second uncoated portion and is formed in at least a part except for a front end portion and a rear end portion of the positive electrode.   
     
     
         20 . The electronic device of  claim 12 ,
 wherein the adhesive is applied to at least a part of the plurality of holes formed in the first uncoated portion of the negative electrode and the plurality of holes formed in the second uncoated portion of the positive electrode, and   wherein the binder coated on the first separator and the binder coated on the second separator directly combine with the adhesive.